2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 /* TODO: should junk this class an replace by
21 a single list of context modifications? */
23 #include "context-def.hh"
26 #include "context-mod.hh"
27 #include "international.hh"
28 #include "output-def.hh"
29 #include "translator.hh"
32 Context_def::Context_def ()
34 context_aliases_ = SCM_EOL;
35 translator_group_type_ = SCM_EOL;
36 accept_mods_ = SCM_EOL;
37 translator_mods_ = SCM_EOL;
38 property_ops_ = SCM_EOL;
39 context_name_ = SCM_EOL;
40 default_child_ = SCM_EOL;
41 description_ = SCM_EOL;
42 input_location_ = SCM_EOL;
46 input_location_ = Input ().smobbed_copy ();
47 context_name_ = ly_symbol2scm ("");
51 Context_def::origin () const
53 return Input::unsmob (input_location_);
56 Context_def::Context_def (Context_def const &s)
58 context_aliases_ = SCM_EOL;
59 translator_group_type_ = SCM_EOL;
60 accept_mods_ = SCM_EOL;
61 translator_mods_ = SCM_EOL;
62 property_ops_ = SCM_EOL;
63 context_name_ = SCM_EOL;
64 description_ = SCM_EOL;
65 default_child_ = SCM_EOL;
66 input_location_ = SCM_EOL;
69 description_ = s.description_;
70 input_location_ = s.origin ()->smobbed_copy ();
71 default_child_ = s.default_child_;
72 accept_mods_ = s.accept_mods_;
73 property_ops_ = s.property_ops_;
74 translator_mods_ = s.translator_mods_;
75 context_aliases_ = s.context_aliases_;
76 translator_group_type_ = s.translator_group_type_;
77 context_name_ = s.context_name_;
80 Context_def::~Context_def ()
84 const char Context_def::type_p_name_[] = "ly:context-def?";
87 Context_def::print_smob (SCM port, scm_print_state *)
89 scm_puts ("#<Context_def ", port);
90 scm_display (context_name_, port);
92 string loc = origin ()->location_string ();
93 scm_puts (loc.c_str (), port);
99 Context_def::mark_smob ()
101 ASSERT_LIVE_IS_ALLOWED (self_scm ());
103 scm_gc_mark (description_);
104 scm_gc_mark (context_aliases_);
105 scm_gc_mark (accept_mods_);
106 scm_gc_mark (translator_mods_);
107 scm_gc_mark (property_ops_);
108 scm_gc_mark (translator_group_type_);
109 scm_gc_mark (default_child_);
110 scm_gc_mark (input_location_);
112 return context_name_;
116 Context_def::add_context_mod (SCM mod)
118 SCM tag = scm_car (mod);
119 if (ly_symbol2scm ("description") == tag)
121 description_ = scm_cadr (mod);
126 other modifiers take symbols as argument.
128 SCM sym = scm_cadr (mod);
129 if (scm_is_string (sym))
130 sym = scm_string_to_symbol (sym);
132 if (ly_symbol2scm ("default-child") == tag)
133 default_child_ = sym;
134 else if (ly_symbol2scm ("consists") == tag
135 || ly_symbol2scm ("remove") == tag)
137 translator_mods_ = scm_cons (scm_list_2 (tag, sym), translator_mods_);
139 else if (ly_symbol2scm ("accepts") == tag
140 || ly_symbol2scm ("denies") == tag)
141 accept_mods_ = scm_cons (scm_list_2 (tag, sym), accept_mods_);
142 else if (ly_symbol2scm ("pop") == tag
143 || ly_symbol2scm ("push") == tag
144 || ly_symbol2scm ("assign") == tag
145 || ly_symbol2scm ("unset") == tag
146 || ly_symbol2scm ("apply") == tag)
147 property_ops_ = scm_cons (mod, property_ops_);
148 else if (ly_symbol2scm ("alias") == tag)
149 context_aliases_ = scm_cons (sym, context_aliases_);
150 else if (ly_symbol2scm ("translator-type") == tag)
151 translator_group_type_ = sym;
152 else if (ly_symbol2scm ("context-name") == tag)
155 programming_error ("unknown context mod tag");
159 Context_def::get_accepted (SCM user_mod) const
161 SCM mods = scm_reverse_x (scm_list_copy (accept_mods_), user_mod);
163 for (SCM s = mods; scm_is_pair (s); s = scm_cdr (s))
165 SCM tag = scm_caar (s);
166 SCM sym = scm_cadar (s);
167 if (tag == ly_symbol2scm ("accepts"))
168 acc = scm_cons (sym, acc);
169 else if (tag == ly_symbol2scm ("denies"))
170 acc = scm_delete_x (sym, acc);
173 SCM def = get_default_child (user_mod);
174 if (scm_is_symbol (def))
176 acc = scm_delete_x (def, acc);
177 acc = scm_cons (def, acc);
184 Context_def::get_default_child (SCM user_mod) const
186 SCM name = default_child_;
187 for (SCM s = user_mod; scm_is_pair (s); s = scm_cdr (s))
189 SCM entry = scm_car (s);
190 if (scm_car (entry) == ly_symbol2scm ("default-child"))
192 name = scm_cadr (entry);
201 Given a name of a context that we want to create, finds a list of context
202 definitions such that:
203 - the first element in the list defines a context that is a valid child of
204 the context defined by this Context_def
205 - each subsequent element in the list defines a context that is a valid child
206 of the context defined by the preceding element in the list
207 - the last element in the list defines a context with the given name
209 The ADDITIONAL_ACCEPTS parameter is a list of additional contexts that this
210 specific context def (but not any of the child context defs) should accept.
212 vector<Context_def *>
213 Context_def::path_to_acceptable_context (SCM type_sym,
215 SCM additional_accepts) const
217 set<const Context_def *> seen;
218 return internal_path_to_acceptable_context (type_sym, odef, additional_accepts, &seen);
222 The SEEN parameter is a set which keeps track of visited contexts, allowing
223 contexts of the same type to be nested.
225 vector<Context_def *>
226 Context_def::internal_path_to_acceptable_context (SCM type_sym,
228 SCM additional_accepts,
229 set<const Context_def *> *seen) const
231 assert (scm_is_symbol (type_sym));
233 SCM accepted = get_accepted (additional_accepts);
235 vector<Context_def *> accepteds;
236 for (SCM s = accepted; scm_is_pair (s); s = scm_cdr (s))
237 if (Context_def *t = Context_def::unsmob (find_context_def (odef,
239 accepteds.push_back (t);
241 vector<Context_def *> best_result;
242 for (vsize i = 0; i < accepteds.size (); i++)
244 /* do not check aliases, because \context Staff should not
245 create RhythmicStaff. */
246 if (ly_is_equal (accepteds[i]->get_context_name (), type_sym))
248 best_result.push_back (accepteds[i]);
254 vsize best_depth = INT_MAX;
255 for (vsize i = 0; i < accepteds.size (); i++)
257 Context_def *g = accepteds[i];
259 if (!seen->count (g))
261 vector<Context_def *> result
262 = g->internal_path_to_acceptable_context (type_sym, odef, SCM_EOL, seen);
263 if (result.size () && result.size () < best_depth)
265 best_depth = result.size ();
266 result.insert (result.begin (), g);
267 best_result = result;
277 Context_def::get_translator_names (SCM user_mod) const
281 SCM mods = scm_reverse_x (scm_list_copy (translator_mods_), user_mod);
283 for (SCM s = mods; scm_is_pair (s); s = scm_cdr (s))
285 SCM tag = scm_caar (s);
286 SCM arg = scm_cadar (s);
288 if (scm_is_string (arg))
289 arg = scm_string_to_symbol (arg);
291 if (ly_symbol2scm ("consists") == tag)
292 l1 = scm_cons (arg, l1);
293 else if (ly_symbol2scm ("remove") == tag
294 && (scm_is_pair (arg)
295 || ly_is_procedure (arg)
296 || get_translator (arg)))
297 l1 = scm_delete_x (arg, l1);
304 Context_def::instantiate (SCM ops)
306 Context *context = new Context ();
308 context->definition_ = self_scm ();
309 context->definition_mods_ = ops;
310 context->aliases_ = context_aliases_;
311 context->accepts_list_ = get_accepted (ops);
312 context->default_child_ = get_default_child (ops);
318 Context_def::make_scm ()
320 Context_def *t = new Context_def;
321 return t->unprotect ();
325 Context_def::apply_default_property_operations (Context *tg)
327 apply_property_operations (tg, scm_reverse (property_ops_));
331 Context_def::to_alist () const
335 ell = scm_cons (scm_cons (ly_symbol2scm ("consists"),
336 get_translator_names (SCM_EOL)), ell);
337 ell = scm_cons (scm_cons (ly_symbol2scm ("description"), description_), ell);
338 ell = scm_cons (scm_cons (ly_symbol2scm ("aliases"), context_aliases_), ell);
339 ell = scm_cons (scm_cons (ly_symbol2scm ("accepts"), get_accepted (SCM_EOL)),
341 if (scm_is_symbol (default_child_))
342 ell = scm_acons (ly_symbol2scm ("default-child"), default_child_, ell);
343 ell = scm_cons (scm_cons (ly_symbol2scm ("accepts"), get_accepted (SCM_EOL)),
345 ell = scm_cons (scm_cons (ly_symbol2scm ("property-ops"), property_ops_),
347 ell = scm_cons (scm_cons (ly_symbol2scm ("context-name"), context_name_),
350 if (scm_is_symbol (translator_group_type_))
351 ell = scm_cons (scm_cons (ly_symbol2scm ("group-type"),
352 translator_group_type_), ell);
357 Context_def::lookup (SCM sym) const
359 if (scm_is_eq (ly_symbol2scm ("default-child"), sym))
360 return default_child_;
361 else if (scm_is_eq (ly_symbol2scm ("consists"), sym))
362 return get_translator_names (SCM_EOL);
363 else if (scm_is_eq (ly_symbol2scm ("description"), sym))
365 else if (scm_is_eq (ly_symbol2scm ("aliases"), sym))
366 return context_aliases_;
367 else if (scm_is_eq (ly_symbol2scm ("accepts"), sym))
368 return get_accepted (SCM_EOL);
369 else if (scm_is_eq (ly_symbol2scm ("property-ops"), sym))
370 return property_ops_;
371 else if (scm_is_eq (ly_symbol2scm ("context-name"), sym))
372 return context_name_;
373 else if (scm_is_eq (ly_symbol2scm ("group-type"), sym))
374 return translator_group_type_;
375 return SCM_UNDEFINED;
379 Context_def::is_alias (SCM sym) const
381 if (scm_is_eq (sym, ly_symbol2scm ("Bottom")))
382 return !scm_is_symbol (get_default_child (SCM_EOL));
384 if (scm_is_eq (sym, get_context_name ()))
387 return scm_is_true (scm_c_memq (sym, context_aliases_));
390 LY_DEFINE (ly_context_def_lookup, "ly:context-def-lookup",
391 2, 1, 0, (SCM def, SCM sym, SCM val),
392 "Return the value of @var{sym} in context definition @var{def}"
393 " (e.g., @code{\\Voice}). If no value is found, return"
394 " @var{val} or @code{'()} if @var{val} is undefined."
395 " @var{sym} can be any of @samp{default-child}, @samp{consists},"
396 " @samp{description}, @samp{aliases}, @samp{accepts},"
397 " @samp{property-ops}, @samp{context-name}, @samp{group-type}.")
399 LY_ASSERT_SMOB (Context_def, def, 1);
400 Context_def *cd = Context_def::unsmob (def);
401 LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
403 SCM res = cd->lookup (sym);
405 scm_remember_upto_here_1 (def);
407 if (SCM_UNBNDP (res))
410 if (scm_is_null (res) && !SCM_UNBNDP (val))
416 LY_DEFINE (ly_context_def_modify, "ly:context-def-modify",
417 2, 0, 0, (SCM def, SCM mod),
418 "Return the result of applying the context-mod @var{mod} to"
419 " the context definition @var{def}. Does not change @var{def}.")
421 LY_ASSERT_SMOB (Context_def, def, 1);
422 LY_ASSERT_SMOB (Context_mod, mod, 2);
424 Context_def *cd = Context_def::unsmob (def)->clone ();
426 for (SCM s = Context_mod::unsmob (mod)->get_mods ();
429 cd->add_context_mod (scm_car (s));
431 return cd->unprotect ();